The Testimony of the Rocks or, Geology in Its Bearings on the Two Theologies, Natural and Revealed. Hugh Miller

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The Testimony of the Rocks or, Geology in Its Bearings on the Two Theologies, Natural and Revealed - Hugh  Miller

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the cases, that it fails to reach the ground. And in almost all the footprints of the primeval birds of the Connecticut there are only three toes exhibited. Peculiar, ill understood laws regulate the phalangal divisions of the various animals. It is a law of the human kind, for instance, that the thumb should consist of but three phalanges; while the fingers, even the smallest, consist of four. And, in the same way, it is a law generally exemplified among birds, that of the three toes which correspond to the fingers, the inner toe should be composed of three phalanges, the middle or largest toe of four phalanges, and the outer toe, though but second in point of size, of five phalanges. Such is the law now, and such was equally the law, as shown by the American footprints, in the times of the Lias. Some of the impressions are of singular distinctness. Every claw and phalange has left its mark in the stone; while the trifid termination of the tarso-metatarsal bone leaves three marks more—fifteen in all—the true ornithic number. In some of the specimens even the pressure of a metatarsal brush, still possessed by some birds, is distinctly traceable; nay, there are instances in which the impress of the dermoid papillæ has remained as sharply as if made in wax. But the immense size of some of these footprints served to militate for a time against belief in their ornithic origin. The impressions that are but secondary in point of size greatly exceed those of the hugest birds which now exist; while those of the largest class equal the prints of the bulkier quadrupeds. There are tridactyle footprints in the red sandstones of Connecticut that measure eighteen inches in length from the heel to the middle claw, nearly thirteen inches in breadth from the outer to the inner toe, and which indicate, from their distance apart in the straight line, a stride of about six feet in the creature that impressed them in these ancient sands—measurements that might well startle zoologists who had derived their experience of the ornithic class from existing birds exclusively. Comparatively recent discoveries have, however, if not lessened, at least familiarized us to the wonder. In a deposit of New Zealand that dates little if at all in advance of the human period, there have been detected the remains of birds scarce inferior in size to those of America in the Liassic ages. The bones of the Dinornus giganteus, exhibited by the late Dr. Mantell in Edinburgh in the autumn of 1850, greatly exceeded in bulk those of the largest horse. A thigh bone sixteen inches in length measured nearly nine inches in circumference in the middle of the shaft: the head of a tibia measured twenty-one inches in circumference. It was estimated that a foot entire in all its parts, which formed an interesting portion of the exhibition, would, when it was furnished with nails, and covered by the integuments, have measured about fifteen inches in length; and it was calculated by a very competent authority, Professor Owen, that of the other bones of the leg to which it belonged, the tibia must have been about two feet nine inches, and the femur about fourteen and a half inches long. The larger thigh bone referred to must have belonged, it was held, to a bird that stood from eleven to twelve feet high—the extreme height of the great African elephant. Such were the monster birds of a comparatively recent period; and their remains serve to render credible the evidence furnished by the great footprints of their remote predecessors of the Lias. The huge feet of the greatest Dinornus whose bones have yet been found would have left impressions scarcely an inch shorter than those of the still huger birds of the Connecticut. Is it not truly wonderful, that in this late age of the world, in which the invention of the poets seems to content itself with humbler and lowlier flights than of old, we should thus find the facts of geology fully rivalling, in the strange and the outré, the wildest fancies of the romancers who flourished in the middle ages? I have already referred to flying dragons—real existences of the Oolitic period—that were quite as extraordinary of type, if not altogether so huge of bulk, as those with which the Seven Champions of Christendom used to do battle; and here are we introduced to birds of the Liassic ages that were scarce less gigantic than the roc of Sinbad the Sailor. They are fraught with strange meanings these footprints of the Connecticut. They tell of a time far removed into the by-past eternity, when great birds frequented by myriads the shores of a nameless lake, to wade into its shallows in quest of mail-covered fishes of the ancient type, or long-extinct molluscs; while reptiles equally gigantic, and of still stranger proportions, haunted the neighboring swamps and savannahs; and when the same sun that shone on the tall moving forms beside the waters, and threw their long shadows across the red sands, lighted up the glades of deep forests, all of whose fantastic productions—tree, bush, and herb—have even in their very species long since passed away. And of this scene of things only the footprints remain—"footprints on the sands of time," that tell us, among other matters, whence the graceful American poet derived his quiet but singularly effective and unmistakeably indigenous figure:—

      "Lives of great men all remind us

       We can make our lives sublime,

       And, departing, leave behind us Footprints on the sand of time. Footprints that perhaps another, Sailing o'er life's solemn main, A forlorn and shipwrecked brother, Seeing, shall take heart again."

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